Three-proofing coating for flexible printed circuit board

A flexible printing and three-proof paint technology, applied in the direction of coating, can solve the problems of inability to resist environmental pollutants, short protection period, circuit board corrosion, etc., to reduce the probability of failure, have both hardness and toughness, good waterproof The effect of blocking moisture

Inactive Publication Date: 2014-10-01
乐凯特科技铜陵有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual application process, the use environment of the circuit board is complex and diverse, and may face humidity, high heat, salt spray, low temperature, vibration, high dust and other environments. If no corresponding effective protection is carried out, the circuit board will quickly appear corrosion, deformation, Mildew, aging and other problems will eventually lead to circuit failure and equipment failure
[0003] In order to reduce the damage to the circuit board by the external environment and ensure the normal operation of the equipment, protective paint is often sprayed on the surface of the circuit board, also known as three anti-paint, and its main

Method used

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Examples

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Effect test

Embodiment

[0012] The conformal paint in this example contains 45 parts of main ingredients and 4 parts of auxiliary agents. The components in the main ingredients and their parts by weight are as follows: 0.01 ocimene, 8 furfuryl alcohol, 38 parts of water-based acrylic resin, 10 parts of ethylene glycol monobutyl ether , silicone resin 15, ammonium persulfate 2, glyceryl monostearate 4, deionized water 25, dimethyl benzyl dodecyl ammonium bromide 2; each component and its parts by weight in the auxiliary agent are as follows: Negative ion powder 2, triethyl phosphite 8, propylene glycol methyl ether 12, benzocyclobutene 6, isopropanolamine 2, cooked tung oil 14, dodecyl glucoside 3, bergamot oil 0.1, benzyl alcohol 6, Dimethicone 1.

[0013] The preparation method of the conformal paint for the printed circuit board is as follows:

[0014] (1) Preparation of additives: first mix negative ion powder with lauryl glucoside and triethyl phosphite, stir evenly and then grind for 20 minutes...

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PUM

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Abstract

The invention relates to the technical field of printed circuit board protection and in particular relates to a three-proofing coating for a flexible printed circuit board. According to the three-proofing coating, the advantages of organic silicon resin and acrylic resin are integrated in formula, a low-toxicity efficient solvent is adopted for promoting dissolution and dispersion of the resin in water, a good curing effect is achieved, and ocimene has an effect of assisting in film formation and endows the coating with pleasant aroma; mixed resin is ultrasonically processed in the solvent at first technologically, so that the mixed resin easily reacts with other materials and is easily compatible with the materials, and the subsequent curing speed is increased; the prepared coating is a waterborne coating, is environmental friendly and has good waterproof moisture-resistant effects, and a cured paint film is good in hardness and toughness, can completely fit the flexible circuit board and is not easily cracked in vibration and bending processes of the flexible circuit board, so that three-proofing effects are further enhanced and the occurrence probability of circuit board faults caused by environmental factors is reduced.

Description

technical field [0001] The invention relates to the technical field of printed circuit board protection, in particular to a conformal paint for flexible printed circuit boards and a preparation method thereof. Background technique [0002] Printed circuit board refers to the formation of point-to-point interconnection lines and printed components on an insulating substrate according to a predetermined design, and is a provider of electrical connections for electronic components. Circuit boards are very common in daily life, ranging from small mobile phones, USB flash drives, and cameras to high-end products such as aerospace and high-speed trains. With the increasing variety and quantity of electronic products, it is particularly important to strictly control the quality of circuit boards to improve the competitiveness of electronic products. In the actual application process, the use environment of the circuit board is complex and diverse, and may face humidity, high heat,...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D7/12
Inventor 沈国良沈志刚宋黄健叶天赦
Owner 乐凯特科技铜陵有限公司
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